Road grader



FQ E. ARNDT Aug. 24,1937.

ROAD GRADER Filed June 7, 1954 5 Sheets-Sheet 1 N Mm 7 Rw m 5 v w .Um mmF. E. ARNDT ROAD- GRADER Aug. 24, 1937.

3 Sheets-Sheet 2 Filed June 7, 1934 [NVENTORJ 4/ E m m 5% W- Aug. 24,1937. ARNDT I 2,090,776

ROAD GRADER Filed June '7, 1934 I 5 Sheets-Sheet 3 IOI f/Vl/E/YTOH Fran/(//'/7 5/4/7701? ATT'X.

Patented Aug. 24, 1937 UNITED STATES PATENT OFFICE Roan GRADEBApplication June '1, 1934, ScriaiNo. 129,432 .2: Claims. (01. 37-164) Myinvention relates to road working machines, particularly of the roadgrader type, and one of the objects of my invention is the provision ofimproved and eflicient mechanism for vfinishing or grading the shouldersat the sides of previously built roadways.

Another object of my invention is the provi- 15 ing-the grader andadjusting the grading mecham'sm thereof, of means for locking saidsteering mechanism whereby the trailer grader maybe operated without aspecial operator, or be transported from place to place withoutrequiring an operator for said trailer grader.

Another object of the invention is'the provision of a novel groundsupporting means for the front end of a trailer grader when it'is notconnected to a hauling vehicle. 25 Still another object of the inventionis the provision of a load limiting draft mechanism for a trailergrader. 1 Afurther object of the invention is the pro- .vision of a newmechanism for; adjusting thethe shoulder of a hard-surfaced roadway on40 which the hauling vehicle travels while trailing the grader behindthe same, and providing means for locking the steering mechanism wherebythe trailer may be transported from placeto place with the moldboardlifted into inoperative posi- 45 tion, without requiring an operator forsaid trailer grader.

Other objects of the invention will appear hereinafter, the novelfeatures and combinations being set forth in the appended claims.

50 In the accompanying drawings,

Fig. 1 is an elevational view of a trailer grader embodying myimprovements; Fig. 2 is a plan view of the machine shown in Fig. 1, withpartsbroken away;

Fig. 3 is an elevational view of the dolphins-- tion of a dumping truckwith the trailer grader shown in Fig. 1; i

Fig. 4 is a. rear elevational view, partly in section, of certaindetails of the steering mechanism connected to the rear wheels of thegrader; 5

Fig. 5 is a side elevational view, partly in section, of the steeringgear locking mechanism taken along the line A-A in Fig. 2;

Fig. 6 is a side elevational view, partly in section of the loadlimiting draft mechanism;

Fig. 7 is a side elevational view, partly in section, of a part of themoldboard adjusting mechanism;

9 Fig. 8 is'a diagrammatic view illustrating the operation ofthe-combination shown in Fig. 3

but illustrating the operation of scraping ma- I terial on the shoulderat the side of a hard-surfaced roadway toward the latter;

Fig. 10 is a diagrammatic view similar to Fig. 8 but illustrating theoperation of scraping material from the central part of a hard-surfacedroad toward one edge thereof, for example, while it is being unloaded bythe hauling dump truck, from where it may be scraped. to the shoulder ina subsequent operation; and

Fig. 11 is a diagrammatic view similar to Fig. 8, but illustrating thecondition in which the wheels of the trailer grader are locked intoposition and the moldboard lifted out of operative relation, while thetrailer grader is being transported from one place to another.

Referring to Figs. 1 and 2, it will be seen that the supporting frame Iis upwardly arched intermediate its ends and is downwardly andrearwardly inclined at '8 for attachment to the transverse crosspiece oraxle 9 to the ends of 40 which are pivoted at III, III the axle bracketsII,

II. for supporting'the rearwheels I2, l2, preferably provided withpneumatic tires.

By referring particularly to Fig. 2, it will be seen that the supportingframe comprises two spaced-apart side members which are horizontal andparallel at their uppermost portions as indicated at ".13 and aredownwardly inclined and converging at'their forward portions asindicated at I4, I. connected together by the :rear cross-piece or axle9 and by the spaced-apart cross-pieces i5 l6, H, II and I9.

The cross-piece is Ueshaped, and between the vertical plates thereof isrigidly secured an 55 The side members are rigidly auxiliarycross-piece23 spaced above the lower horizontal plate of the cross-piece l3, asshown in Fig. 1. The auxiliary cross-piece 23 is provided with verticalspaced-apart forwardly ex- 5 tending plates 2|, 2| between which ispivoted by means of a bolt 22, the rear end of the machine drawbar 23,to the forward end of which is secured the hook 25, the vertical member25 of which is adapted to fit into a hole in the plate 21 1 attached tothe rear end of the frame 28 of the dumping truck 23, s hown in Fig. 3.

A collar 33 on the vertical member 25 of the hook 25 is adapted to reston top of the plate 21. and a cotter pin 3| at the lower end of thememher 25 may be relied upon to lock the hook 25 to the frame 28 of thedumping truck while the trailer grader is in operation as illustrated inFig. 8, 9, 10 or 11.

At the forward ends of the converging portions I4, I 4 of the supportingframe I of the machine are attached spaced-apart plates 32, 32 which arepreferably each triangular in shape as shown in Fig. 1, and are providedwith a series of holes 33 for receiving a bolt 34 to hold the hook at an25 adjusted elevation relative to the frame 1.

Under the supporting frame 1 is a moldboard drawbar or supplementalframe 35 which tapers or converges forwardly as shown in Fig. 2. Securedto the forward ends of the side members 33, of the moldboard drawbar 35is a horizontal plate 31 which tapers or converges forwardly and isprovided with an opening through which loosely extends the bolt 38. Theplate 31 rests on a boss 33 at the center of the upper surface of thehorizontal plate of the U-shaped cross-piece l3. A spring 43 is locatedbetween the auxiliary cross-piece 23 and the plate 31. This springsurrounds the bolt 38 and urges the plate 31 against the boss 33. Theopening in the plate 31' is of 40 sumcient size to permit adjustingmovements of the drawbar 35 on the boss 33 On longitudinal andtransverse axes.

Pivotally connected at 4| to the rear end of the moldboard drawbar 35is-a circle 42 for support- 45 ing the scraper blade or moldboard u foradjustment relative to the drawbar 35 on the upright axis of the pivot4|. The circle 42 and'the scraper blade or moldboard 43 rigidly attachedthereto may be locked in adjusted position to the moldboard drawbar 35by means of the latch mechanism 44.

At the rear end of the moldboard drawbar 35 is a transverse angle iron45 to the ends of which are connected by means of the ball and socketjoints 45, 45 the lower ends of the vertical hangera 41, 41. The upperends of the hangers 41. 41 are connected by means of the ball and socketjoints 43, 43 to the rearwardly extending arms 43, 43 of the bell cranks53, 53 which are pivotally mounted on transverse horizontal axes tobrackets one of which is shown in .elevation at 5| in Fig. 1. Thebrackets 5| are preferably lo-' cated on the tops of 'the forward endsof the horizontal portions l3 of the supporting frame 1 im- 65 mediatelyabove the ends of the cross-piece |1.

To the upper ends of the vertical arms 52 are pivoted at 53, 53 the nuts54, 54 through which are threaded the screw-threaded inner endiportions55 of the rods 53, 53, the rear and outer ends of which are journaled inthe marine 51, :1.

As best illustrated in Fig. '1. the nuts 54, 54

are provided with tubular extensions 53, 53 forwardly of the pivots 53.53. These'tubular extensions'constitute housings for thescrew-threaded75 inner end portions 55 of the rods 55, 5 5, MM?

ing them from the elements, and providing lubricationpockets therefor.Each of the tubular extensions 58 is preferably provided with an opening58 at one end thereof adiacent its top portion for the reception of oiland to prevent any possible piston action due to the telescoping ofextensions 58, 58 and the end portion 55 of rods The nut 54 is alsoprovided with rearwardly extending tubular portions 53, 53the rear endsof which are provided with slide bearings 53 for the rods 55, 55. Itwill thus be seen that the screw-threaded portions 55 with the rods 55,55 are entirely enclosed by the tubular extensions 55, 55v and 59, 59.

On the rear ends of the rods 55 are spaced collars 5|, 5| and 52, 52held in 'place by the nuts 53, 53 as shown in Figs. 1 and 2, so that therods 55, 55 may rotate in the bearings 51, 51 but cannot be movedlongitudinally therein. The bearings 51, 51 are pivotally mounted at 54,54 to the uppenends of brackets 55 mounted on the rear ends of thehorizontal portions |3,-|3 of the supporting frame 1 adjacent to thecross-piece l5.

Between the rearwardly extending and downwardly inclined portions 8, 8of the supporting frame is rigidly secured an operator's platform 55 asshown in Figs. 1 and 2. An operators seat 51 may also be secured at 58to the center of the cross-piece |5 in position to enable the operatorto reach either or both of the wheels 53, 53 which are connected to therear ends of the screw rods 55, 55. It will thus be seen that thehangers 41, 41 may be individually lifted or lowered by rotating thewheels 53, 53 each of which actuates screw elements cooperating with nutelements to swing the bell cranks 53, 53 ontheir horizontal transverseaxes. The moldboard or scraper 43 may thus be adjusted in elevation andin inclination relative to the surface on which the machine issupported.

Since the forward end of the moldboard drawbar 35 is pivotally connectedon a vertical axis to the U-shaped cross-piece l3, and since the hangersare universally connected at their lower ends to the outer ends of thecross-bar 45 and universally connected at their upper ends to the bellcranks,the rear end of the drawbar together with the circle andmoldboard or scraper may be shifted laterally relative to the supportingframe 1.

Secured to one end of the cross-bar 45 is a vertical plate 13 which isprovided with an opening through which the lower end of the retainingrod 1| extends for pivotal connection to the transverse bar 45. Thelower end of the retaining rod 1| may beretained by means of the cotterpin 12 in itspivotal connection to the plate 13. The upper end of therod 1| is hooked at 13 to extend through an eye 14 suspended from thetubular bracket 15 which is slidable along the cylindrical cross-piecel5. The latter is provided with a series of vertical holes 15 into whichis adapted to extend a pin 11 in the tubular bracket 15, to hold thelatter in adjusted position. Consequently, after the rear. end of thedrawbar together with the circle-and scraper or moldboard carriedthereby have been shifted laterally they may be held in adjustedposition by means of the retaining 'rod 1| and the parts connectedthereto. including the pin 11.

It is to be noted that the particular arrangement of the parts providesa clear view of the moldboard or scraper during its operation by theoperator onseat 31. Contributing to this feature is the arm 43 whichextends rearwardly from its pivot about the longitudinal center of theframe frame 1 so as to avoid obstruction of the operators vision. Inview of this arrangement of parts, the operator is not operating hismachine blind but at all times can directly observe its immediateoperation.

It should be understood that when the trailer grader is detachablyhooked to the rear end of a' hauling vehicle, steering of the grader iseffected by movement of the rear wheels I2, I2 on the ver tical pivotsI8, I8 while the hauling vehicle is traveling along the roadway. Forthis purpose a steering wheel 18 is mounted near the operators platform66 and near the operators seat '81 and is connected to the axle bracketsII by the mechanism shown in Figs, 2 and 4. Connected rigidly to theaxle brackets II, I I are forwardly extending arms 18, 18, the forwardends of which-are connected by ball and socket joints 88, 88 to thetransverse steering bar 8|. To one end of the transverse steering bar 8Iis connected 0 by means of a universal joint 82 the transverse steeringshaft 83, the other end of which is pivoted at 84 to the lower end ofthe arm 85 carried on a shaft 86 from gear casing 81 carrying the lever88 operated by the spiral cam 88 through 5 pin 88 carried on lever 88and adapted to ride in the groove 88' formed-by the spiral cam 88. The

spiral cam 88 is secured to the steering rod or post 8I, the lower endof which is mounted in suitable bearings in the casing 81 and the upper40 end of which is. connected 'to the steering wheel 18. The casing 81is rigidly secured to one of the side members of the supporting frame,as shown in Fig. 2.

When the grader is detached from a hauling vehicle, the front endthereof may be supported by the foot rest 82, as shown in full lines inFig. 1. The upper end of the foot rest 82 may be pivoted at 88 to thebottom of the U-shaped crosspiece I9. I

When the grader is inoperation, the foot rest ,82 may be swung to itsdotted line position shown in Fig, 1 and held in such position by meansof a hook 84 extending through a hole in the bottom plate 85 of the.foot rest. The book 84 may be connected to a clevis'88 pivotallyconnected at 81 to the bottom of the machine or trailer drawbarReferring particularly to Fig.'6, there is seen a drawbar gear forlimiting the load which may be applied to the scraper or moldboard 48 toprevent injury thereto. The trailer drawbar 23 is pro-' vided with aninternal sleeve bearing 288 rigidly attached to trailer drawbar 28, asby welding at 28I.

' e5 Hook :5 is-provided with an integral extension 282 and a flange 288intermediate its ends.

Extension 2824s movably mounted in sleeve bearing288 and its rearwardmovement with-respect to said bearing is restricted by flange 288. At- 70 the rear end, said extension 282 carries a removable collar 284normally held fast thereto by a sheer pin 285. The forward face of saidcollar 284 normally abuts the rear face of sleeve 288. It is thus seenthat the draft is transferred from 75 the hook 25 to the trailer drawbar28 by a draft gear including as one element the sheer pm 285. Should anexcessive load be placed on the scraper or moldboard, as by its strikingsome solid object, the sheer pin 285 will sheer and prevent damage tothe grader trailer. The trailer drawbar 28 is provided with an elongatedaperture 286 to provide access for the removal or insertion of a newsheer pin 285.

Referring particularlyto Figs. 2 and 5, there is seen the mechanism foradjustably locking the wheels I2 in a. fixed position whereby the gradertrailer may be transported from one position to another withoutrequiring a separate operator, the'trailer grader then merely operatingas a trailer'to follow the truck 28.

Rigidly attached to the transverse crosspiece 8, which comprises theaxle of the trailer grader with parallel uprights I58, I58 andhorizontal reinforcing webs I5I, as by welding, are a pair ofspaced-apart upright brackets 'I52, I52. Said brackets I52, I52aresubstantially centrally apertured to loosely receive a threaded boltI58 held rigid in said uprights by a nut I 54. Pivote-lly carried onsaid bolt I58 is an arm I55 adaptedto be dropped between spaced lugsI58, I58 carried on the steering bar 8|, and to hold said bar 8| againstmovement. Carried by the threaded bolt I58 on both sides of said arm I55are nuts I51, I51 which may be adjusted on said bolt I53 and therebyvariably determine the position 'of the wheels I2 when locked. Thisprovides for the proper trailing of the trailer grader for severalpossible .lateral positions at which the hook 25 may be attached to thetruck. I J

Thearm I 55 may be provided with a cross piece I68 which provides ahandle therefor and also provides a rest which is carried-on member I5Iwhen the arm I55 is in the non-locking position. As is evident fromFigs. 2 and 5, when the arm I55 is in the/position indicated thesteering bar 8| is locked against movement and in turn the-wheels I2 arelocked against any pivotal movementl i The operation of the trailergrader shown in Figs. 1, 2 and 3 is illustrated diagrammatically I 'theroadway on to the shoulder located between the lines 88 and I88. Duringoperation of the grader to finish the shoulder at one side of theroadway, the traffic on the roadway moving in the direction of the arrowI8I need not be interfered with. V

Inasmuch as the inclination of the moldboard or scraper 48 whenoperating on material as indicated in Fig. 8, tends to swerve the frame.1 toward the center of the roadway, the steering mechanism is sooperated as to incline the wheels I2, I2 as indicated in Fig. 8. That isto say, the axles of the wheels I2, I2 are tilted in a clockwisedirection relative to the longitudinal lines '88 and I 88 to counteractthe tendency of the operating mold board to swerve the frame 1 in theopposite direction, the resultant movement of the moldboard being inalongitudinal direction along .the line 88 while the moldboard is held inits a directly back of the truck so that the dumping mechanism ofthe'latter may be operated to gradually unload road building materialtherefrom while the scraper or moldboard moves such 5 material oiI theroadway on to the shoulder. This operation is diagrammaticallyillustrated in Fig. of the drawings. In this operation, a separateoperator for the trailer grader may not be essential, and by locking thewheels I2, l2 by the 10 above described mechanism, he may be dispensedwith. This may be followed by another operation such as that illustratedin Fig. 8, to spread and grade the material along the shoulder betweenthe lines 98 and 99. When it is desired to scrape material from theouter portion of the shoulder toward a depression at the edge of theroadway, the moldboard or scraper may be adjusted to the position shownin Fig. 9 when the tendency will be for the moldboard to swerve the rearend of the frame I away from the roadway on which the truck 29 travels.Consequently, the steering mechanism is so operated under thesecircumstances as to tilt the rear wheels to travel toward the centerline of the'roadway. That is to say, the wheels are tilted in such'adirection as to counteract the swerving tendency due to the moldboard,the resultant movement being along lines parallel to the edge 98 of theroadway while the moldboard 30 is held in adjusted position relative tothe supporting frame I.

In each of the three operating conditions illustrated in Figs. 8, 9 and10, the scraper or moldboard was in a lowered position adapted to douseful work. When the moldboard is vraised to an inoperative positionand the trailer grader is to be transported from one place to another bythe truck 29, the steering wheels I! are locked in position by the abovedescribed locking means. 4 This condition is diagrammaticallyillustrated in Fig. 11. As is readily seen from Fig. 11, in order toprovide for the proper trailing of the grader trailer when it is hookedto one side of the truck frame, as at 21, the wheels I! must be lockedin a 5 tilted position different from that required in the operationillustrated in Fig. 10. This is provided by the adjustable features ofthe locking means, particularly the threaded bolt I53 and the nuts I51,I51, As the grader trailer will, in general, 5 have a wider wheel gaugethan the truck, the locking mechanism may be set to allow one of thewheels I! to run on the shoulder during transportation thereof. However,if desired, this looking mechanism may be set so that both' wheels 5 i2will travel on the hard surface road when the trailer grader istransported behind the truck without an operator on the seat 51.

Inasmuch as it is well known that the conventional truck used onhighways in road building 6 work is of the motor or self-propelled typeand operable at relatively high speeds under the control of a singleoperator, it is obvious that when the attachment shown in theaccompanying drawings is hooked to such a truck withthe 5 steeringmechanism for the wheels I 2, i2 locked in position for transportation,and the moldboard held in elevated position for ample clear ance of theroad surface, as illustrated diagrammatically in Fig. 11, the trailerunit may be quick- 7 ly'taken to any place on a highway by a singleoperator, particularly in cases of emergency.

Thatistosay,byreasonotthereadyattsch.-'

ment of-such a trailer unit to a'motor truck at adjusted elevation tosupport the front end of 75 the frame in such position that themoldboard will have ample clearance relative to the road surface, rapidportability from job to job for quick restoration of the contours ofshoulders of the highway is available, because the same motor truck thatis used for such rapid portability to the shouldersneeding repair isalso useful for pulling the grader unit during its shoulder restoringoperations. The hitch connection at 22, 32, 33, 34 is adjustable notonly for'height of the truck frame for transportation but also forshoulder grading operations, and the pin 3i prevents detachment of thetrailer unit from the truck and therefore assurance is had that duringgrading operations, the moldboard will be held ,down to its work. 1

It will thus be seen that the trailer grader unit is particularlyadapted for rapid portability from one place along the roadway toanother and for quickly restoring the contour of shoulders whenever andwherever repair may be necessary, although located at widely spacedpoints along the highway. Soft shoulders out of repair are not only adangerous hazard to automobile traflic on the hard surfaced pavementbetween such shoulders, but the trafiic that moves off and on the edgesof the pavement where the shoulders need repairing, is very destructiveof the pavement itself. The readiness with which the trailer grader unitmay be attached to any motor truck available irrespective of theelevation of its frame from the road surface, and its small weightnotwithstanding its full range of adjustments for grader work, rendersthe trailer unit well adapted for quick transportation to places whereemergencies require quick repair of shoulders to remove dangeroushazards to trafllc.

The same motor truck used for transportation may also be used fortraction when the grader unit is operated along the shoulder, but duringsuch operations it is preferable that an additional operator be reliedon to control the steering of the rear wheels, [2, I2, while he sits onthe seat 61, with the cutting blade 43 under his direct observation andwith themoldbo'ard adjusting wheels 59, 69 within his reach. Suchadditional operator need not, however, occupy the seat 51 during rapidtransportation of the trailer grader unit along the highway becauseduring such rapid transportation the locking mechanism illustrated atI55 may be relied on to hold the wheels I2, I! in proper trailingpositions.

Obviously those skilled in the art may make various changes in thedetails and arrangement of parts without departing from the spirit andscope of the invention as defined by the claims hereto appended, and Itherefore wish not to be restricted .to the precise constructionhereindisclosed.

Having thus described and shown .an embodiment of my invention, what Idesire to secure by Letters Patent of the United States is: 1. In aroad-working machine, the comhinahangers, nut and screw elements,operator's wheels connected to said screw elements to rotate the same,enclosing tubes for the nut elements, and pivotal connections betweenthe upper arms of said bell-cranks and said enclosing tubes intermediatethe ends of the latter.

2. In a road-working machine, the combina tion with a supporting frame,of a supplemental frame connected thereto, a road-working implementcarried .by said supplemental frame, up-

right hangers at opposite sides of said supporting frame for adjustingsaid supplemental frame and the road-working implement carried thereby,bell-cranks pivoted to the top of said supporting frame with the lowerarms thereof extending-longitudinally and the upper arms extendingvertically, pivotal connections between the lower arms and the upperends ofsaid hangers, nut elements piv'otally connected to the upper endsof said vertical arms, screw elements extending through said nutelements, means for rotating said screw elements individually, and

tubular enclosures for said nut and screw elements and extendingforwardly and rearwardly of the upper ends of said vertical arms.

3. In a road-working machine, the combination with a supporting frame,of a road-working implement mounted thereon for adjustment relativethereto, nut and screw elements for adjusting said road-workingimplement, a telescopic enclosure for said nut and screw elements andcomprising tubes with the nut elements located intermediate the endsthereof, means pivotally connected to said tubes at the points wheresaid nut elements are located for connecting the nut elements to saidroad-working implement, and

means for operating said screw-elements through said nut elements whileprojecting in opposite directionsfrom said nut elementsin said tubes.

4. In a road grader, the combination with a supporting frame, of meansfor supporting said frame for travel along a roadway, a supplementalframe flexibly connected at its front end to the 40 forward portion ofsaid supporting frame, a moldboard adjustably carried by saidsupplemental, frame, hangers at opposite sides of said supporting frameand flexibly connected at their lower ends to aid supplemental frame,bell-cranks pivoted t the top of said supporting frame and havinglongitudinally extending arms flexibly connected to the upper ends ofsaid hangers,

closed tubular nut elements pivotally connected intermediate their endsto the upper ends of so upright arms of said bell-cranks, tubularbearings pivotally connected to said supporting frame, screw elementsjournaled in said bearings for rotation only and extending into said nutelements, and wheels connected to said screw elements to I s5 rotate thesame individually to effect lifting or lowering of either hangerindividually.

5. In a road-working machine, the combination with a supporting frame,of a supplemental frame, a road-working implement carried there- 60 by,a U-shaped cross-piece secured to said sup-- porting frame andcomprising a bottom plate, an

auxiliary cross-piece spaced above said bottom plate, a pivot pinbetween said bottom plate and said auxiliary cross-piece for plvotallyconnect- 65 ing the front end of said supplemental frame to a adapted tobe detachably connected to a hauling ,7 vehicle to be pulled andsupported thereby, said drawbar comprising a rod section telescopinginto a tubular section, and a shearing connection 7 between the Sectionsof said drawbar and tendered accessible by an opening in said tubularsection. I

7. In a road-working machine, the combinetion with a supporting framecomprising spacedapart side beams converging toward each other at their.forward ends, of wheels for supporting the rear end of said frame, across-piece connecting the converging side beams near the front.

end of said frame, a drawbar pivotally connected to said cross-piece andextending forwardly be tween the forward ends of said side beams,spaced-apart vertical platessecured to the front ends of said side beamsat the side of said drawbar, and mechanism for securing said drawbar tosaid plates at adjusted elevation relative to the front end of thesupporting frame.

8'. In a road working machine, the combination with a supporting frame,of means for supporting the same for travel along a roadway, a moldboardadjustably mountedon said frame, mechanism comprising hangers atopposite sides of said frame and flexibly connected at their lower endsto said moldboard, bell cranks pivoted to said frame and having theirlower arms flexibly connected to the upper ends of said hangers, nut andscrew elements, mechanism connected to said screw elements to rotate thesame, tubes extending in opposite directions from said nut elements toserve as housings for said screw elements, and pivotal connectionsbetween the upper arms of said bell cranks and the opposite sides ofsaid nut elements between-the oppositely extending tubes. v

9. A road working machine comprising a. 'frame, a road-working implementadjustably mounted thereon, means comprising a. hanger flexiblyconnected at its lower end to said roadworking implement, a bell crankpivoted to said frame and having one arm flexibly connected to the upperend of said hanger, nut and screw elements, a pivotal connection betweenthe other arm of said bell crank and the nut element,

housings for the screw element connected to said nut element to extendin opposite directions therefrom, and mechanism for rotating the screwelementto actuate said bell crank on its pivot to effect adjustment ofsaid road-working implement relative to said frame.

10. In a road-working machine, the combination with a supporting frame,of means for supporting the same for travel along a roadway, aroad-working implement adjustably mounted'on said frame, a hangerflexibly connected at its lower end to said road-working implement, a

bell crank having its lower arm flexibly connected to the upper end ofsaid hanger, nut and screw. elements, mechanism connected to the screwelement to rotate the same, a tubular enclosure for the nut element, anda pivotal connection between the upper arm of the bell crank and thetubular enclosure intermediate the ends of the latter.

-l1. In a road-working machine, the combina tion with a supportingframe, of a supplemental the lower arm thereof extending longitudinallyand the upper arm extending vertically, a pivotal connection between thelower arm and the upper end of said hanger, a nut element pivotallyconnected to the upper end of said vertical arm,

a screw element extending through said nut element, mechanism forrotating said screw element,

and a tubular enclosure for the nut and screw elements and extendingforwardly and rearwardly of the upper end of the vertical arm.

12. A road-working machine comprising a main frame and a supplementalframe, a road- 10 working implement carried by said supplemental frame,a hanger flexibly connected at its lower end to said supplemental frame,a bell crank one arm of which is flexibly connected to the upper end ofsaid hanger, a nut elementpivotally connected to the other arm of saidbell crank, a screw element threaded through said nut element, a shaftfor rotating said screw element, a tubular enclosure for said nut andscrew elements, a slide bearing at one end of said tubular enclosure forsaid shaft, means for supporting said shaft for rotation, and awheel forrotating said shaft.

13. In a road-working machine, the combination with a frame, ofsupporting wheels for the rear end thereof, mechanism at the forward endof said frame for detachably connecting the same to a hauling vehicle,said mechanism comprising a drawbar pivotally connected to a cross-baron said frame, a foot-rest pivotally connected to said cross-baradjacent to the pivot of said drawbar, and means carried by said drawbarfor supporting said foot-rest up off the ground when said drawbar isoperatively connected to the hauling vehicle. a

14. In a road-working machine, the combination with a frame, of wheelsfor supporting the rear end thereof, mechanism at the forward end ofsaid frame for detachably connecting the same to a hauling vehicle, saidmechanism com prising a drawbar pivotally connected to a crossbar onsaid frame, a foot-rest pivoted to said cross-bar adjacent to the pivotof said drawbar, a road-working implement, a supplemental frame forsupporting said road-working implement, and means comprising a flexibleconnection between said supplemental frame and said cross-bar adjacentto said pivots for adjustably supporting the said supplemental frame and'said roadworking implement in predetermined relation to the surface ofthe roadway. 7 V 15. In a road-working machine, the combination with asupporting frame, of spaced-apart cross-pieces rigidly connected to saidframe, a

vertical pivot pin connecting said cross-pieces a supplemental framepivotally connected at its front end to said pivot pin between saidcrosspieces, a spring on said pivot pin between the front end of saidsupplemental frame and one of said cross-pieces, a road-workingimplement carried by said supplemental frame, and means between saidframes for effecting adjustment of the supplemental frame and saidroad-working implement.

16. In a device, of the class described, the combination with a mainframe, of means for sup- .65 portingthe rear end thereof, a U-shapedcrosspiece rigidly connected to the forward portion of said frame andcomprising a bottom plate, an auxiliary cross-piece rigidly connected tosaid U-shaped cross-piece and spaced above 'said bot- 70 tom plate, adrawbar adjustably connected intermediate its ends to the forward end ofsaid frame and pivoted at its rear end to said auxiliary cross-piece, afoot-rest pivoted to said bottom plate and adapted toswlng upwardly off75 the ground, means for holding the foot-rest in suspended position oflthe ground, a vertical pivot pin connecting said bottom plate and saidauxiliary cross-piece, asupplemental frame pivotally connected at itsforward end to' said vertical pivot pin, a road-working implementcarried by said supplemental frame, and means on said supporting frameconnected to said sup-- tion with a supporting frame comprisingspacedapart side members, of wheels for supporting the rear end ofsaid'frame, a cross-piece connecting said side members rearwardly of thefront end of said frame, a machine drawbar pivotally connected at itsrear end to said cross-piece intermediate the-ends of the latter andextending forwardly for detachable connection to a hauling vehicle,means between the front ends of said side members .and said machine'drawbar for supporting the front end of the latter at adjustedelevation relative to said frame, a moldboard. a moldboard drawbar forsaid moldboard, a connection between the front end of said moldboarddrawbar and said cross-piece intermediate the ends of the latter, andmechanism on said frame connected to said moldboard drawbar to effectadjustment of the moldboard relative to said frame.

18. In a roadworking machine, the combination with a supporting framecomprising spacedapart side members converging toward each other attheir forward end portions, of wheels for supporting the rear end ofsaid frame, a cross-piece rearwardly of the front end of said framebetween said converging side members, a machine drawbar pivotallyconnected at its rear end to said cross-piece, means for adjustablyconnecting said machine drawbar intermediate its ends to the front endsof said side members to hold the front end of said machine drawbar atadjusted elevation relative to said frame, a moldboard, a moldboarddrawbar pivotally connected at its front end to said cross-piece, andmechanism on said frame and connected to said moldboard drawbar toeffect adjustment of the moldboard relative to said frame, theconnections between said drawbars and said side membersbeing-constructed and arranged to afford a direct pulling connectionbetween said machine drawbar and said moldboard drawbar. 19. In a roadworking machine, the combination with a supporting frame having anupwardly arched portion, of wheels connected to the rear end of saidframe, steering mechanism connected to said wheels, a road workingimplement carried by said frame under said upwardly arched portion, adrawbar pivoted at its rear end to said frame rearwardly of its frontend, means adapting the front end of said drawbar for pivotal connectionto a hauling vehicle for freedom of lateral movement of etli e rear endof said frame through a wideza ngle, and mechanism between the saidframe and said drawbar intermediate the ends of the latter for adjustingthe elevation of the road working implement relat ve to the road surfacefor rapid transportation by means of such hauling vehicle.

20. In a road working machine, the combination with a supporting framecomprising spacedapart side beams converging toward each other at theirforward ends, of wheels for supporting i the rear end of said frame, aroad working implement carried by said frame, a drawbar pivot allyconnected to said .frame rearwardly of its front end and located betweenthe converging front ends of said beams and extending forwardly of saiddrawbar at adjusted elevation relative to said frame, mechanism at thefront end of said drawbar for detachably connecting the same to ahauling vehicle, and mechanism carried by said frame for adjusting theelevation of said road working implement relative to the road surfaceindependently of the adjustment between the frame and thedrawbar, theconstruction and arrangementibeing such that the aforesaid adjustmentsco-operate to support the road working implement to clear the roadsurfaceduring rapid transportation and to hold the-road workingimplement to its work during road working operations.

21. In a road working machine, the combination with a supporting frame,of wheelafor'supporting the rear end of said frame, a road workingimplement carried by said frame, a drawbar pivotally connected to saidframe for adjustment in elevation of the front end thereof relative tosaid frame, means at the front end of said drawbar adapting the same forpivotal connec-- tion to a hauling vehicle to secure support of thefront end of said frame by said hauling ve-'- hicle, mechanism betweensaid frame and said drawbar intermediate the ends of the latter 'th holdthe front end of the drawbar at adjusted elevation relative tosaid'frame, mechanism carried by said frame for. adjusting the elevationof the road' working implement relative to the road surfaceindependently of the adjustment between the frame and the drawbar,steering mechanism connected to said wheels for control from anoperators station on the rear portion of -said frame from which-stationthe adjusting mechanism for the .road working implement ,is alsooperable, and releasable locking means for the steering mechanism tohold the said wheels in trailing positions when such hauling vehiclerapidly transports the machine along the roadway while said drawbar androad working implement adjustments co-operate .to support the roadworking implement with ample clearance from the road surface.

22. In an attachment to a truck adapted to cooperate therewith to form aroad shoulder grader, the combination with a vehicle frame having anupwardly arched portion, of a pair of steer- "ing wheels pivoted onupright axes to the rear end of said frame, an operators station on saidframe, steering mechanism connected to said steering wheels and operablefrom said operator's station, a moldboard carried by said? frame undersaid upwardly arched portion, amachine drawbar, means adapted to readilyconnect and disconnect the forward end of said drawbar to a truck,mechanism between said drawbar and the forward end of said frame forconnecting said drawbar to saidzframe with the forward end oftruck. l

said drawbar at adjusted elevation relative to the said vehicle frame soas to be at adjusted elevation relative. to the road surface, the frontend of the frame being solely dependent for its support on the drawbarand its connections to the truck and to the vehicle frame duringtheoperation of the moldboard, and means operable from the operatorsstation for adjusting the elevation relative to the road surface ofeither end of the moldboard independently of the other end, theconstruction and arrangement being' such that when the vehicle frame istowed by said truck with the front end of said frame supported bythedrawbar and the truck frame the operator at his station may efi'ectsteering of the rear end of the vehicle frame through a wide angle ontowheels connected to the rear end of said frame,

an operators station on said frame, steering mechanism connected to saidwheels and opera ble from said station, a road working implement carriedby said frame under said upwardly arched portion a drawbar pivoted atitsrear end to said frame rearwardly of its front end, means adapting thefront end of, said drawbar for pivotal connection to a towing truck forfreedom of lateral movement of the rear end of said frame through a wideangle, mechanism between the front end of said frame and said drawbarintermediate the ends of the latter for holding the frontend of thedrawbar at adjusted elevation relative to said vehicle frame, the frontend of said vehicle frame being solely dependent for its support on thedrawbar and its connections to the truck and to the vehicle frame duringthe operation -of the road working implement, and means for adjustingfrom the operators station the elevation of the road working implementrelative to the road surface, the construction and arrangement beingsuch that when the vehicle frame is being towed by said truck with the ashoulder at'one side of the path of travelof front end of the framesupported by the drawbar and the truck frame the operator at his stationmay effect steering of the rear end of the vehicle frame through a wideangle onto a shoulder at one-side of the path of travel of the truck foroperation-of the road working implement on such shoulder and theoperator during such operation may vary the depth andtransverseinclination of the road working implement action and vary the steeringaccordingly to maintain the roadworklng implement path of travel alongsaid shoulder at one side of the path of travel of the

